Levi fisher



(No Model.)

L. FISHER.- GANG 311 011.

No. 599,997. Patented Mar. 1, 1898-.

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LEVI FISHER, OF BRANTFORD, CANADA.

GA'N G-- PU N CH.

SIECIFICATION forming part of Letters Patent No. 599,997, dated March 1, 1898.

Application filed. October 16, 1897( Serial No. 655,433. (No model.)

To all whom it may concern.-

Be it known that I, LEVI FISHER, of Brantford, in the Province of Ontario and Dominion of Canada, have invented certain new and useful Improvements in Gang-Punches, of which the following is a full, clear, and exact description.

The object of the invention is to provide certain new and useful improvements in gangpunches whereby the punches and dies can be readily adjusted according to the work on hand and securely locked in position to insure proper punching. 1

The invention consists principally of a punch-stock fitted in a head and adapted to carry a pressure-pin engaged by the punch and a coupling screwing on the punch-stock for pressing the pin in engagement with the head and for clamping the punch-stock in place on the head.

The invention further consists of longitudinally-split die-holders arranged to receive and hold the dies and fitted loosely in a groove formed in a base-block and a pressure-bar fitted into the said groove and engaging with its inner beveled edge the forward faces of the die-holders.

The invention also consists of certain parts and details and combinations of the same, as

will be fully described hereinafter and then pointed out in the claims. I

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the figures.

Figure 1 is a front elevation of the improvement. Fig. 2 is a plan view of the base and dies supported thereon, parts being broken out. Fig. 3 is a cross-section of the head with the punch and its holding device in place, and Fig. 4 is a cross-section of the base on the line 4 4: of Fig. 2.

The improved gang-punch illustrated in the I drawings is mounted on the usual frame A,

supporting a base-block B, supporting the dies 0, over which operate punches E, carried by a reciprocating head D, bolted or other wise fastened to the ram of the machine. Each of the dies 0 is removably held in a longitudinally split die holder F, the sections of which are connected with each other by transversely-extending dowel-pins F, as is plainly indicated at the right in Fig. 2 and in dotted lines in Fig. 4.

The front and rear edges of each die-holder F are beveled and rest in a longitudinallyextending groove B, formed in the top of the base-block B, the said groove opening at its middle into an aperture B for the passage of the punched-out material. The rear bevel of each die-holder F fits into the correspondingly-beveled wall B of the groove B, and the front bevel of each die-holder is engaged by the inner correspondingly-shaped end of a pressure-bar G, fitted to slide laterally and guided for this purpose. on screwsH, screwing into the base-block B and having their heads in countersunk recesses formed in the bar G. Set-screws I screw in the base-block B and abut against the pressure-bar G to move the latter in a transverse direction against the several die-holders-F, so as to sethe punches and the work under treatment.

A cover-plate J is attached to the top of the base-block B for covering up the joint between the base-block and pressure-bar and also the heads of the screws H, as is plainly indicated in Fig. 4.

Now it will be seen that by the arrangement described the operator upon slightly unscrewing the set-screws I releases the dieholders F sufficiently to permit of sliding the same longitudinally in the groove B until they are moved to the desired position, according to the nature of the work on hand, and then the operator screws up the screws I to move the pressure-bar G against the die-holders, so as to securely lock the same in place in the groove B and at the same time clamp the die in place on the die-holder, owing to the split nature of the latter.

0n the top of the base-block B, near the rear end thereof, is arranged a longitudinally-extending dovetailed groove B adapted to be engaged by correspondingly shaped heads K of bolts K, each engaging a stripper L, projecting with its forward forked end L over a corresponding die 0 to hold the work in position during the return movement of the the open portion of the forked end L.

' plainly shown in Fig. 2.

The bars of the gage N are formed with transversely-extendin g registering apertures for a gage-pin O, the head 0 of which forms a rest for the inner edge of the work under treatment, each pin beingheld on an eyebolt P, extending upwardlybetween the two bars of the gage N, the nut P resting on the top of a washer P located on the top of the gage N, so that when the nut P is screwed up the pin 0 is securely locked in place in the gage N. 13y unscrewing the nut P the pin 0 may be readily adjusted laterally, according to the distance the holes are to be punched from the inner edge of the work under treatment.

Now it will be seen that by the arrangement described the strippers L can be readily adjusted in a longitudinal direction, according to the position of the die-holders and dies, and the gage-pins O can be readily adjusted transversely, according to the nature of the work under treatment, as above mentioned. The gage N is of a suitable length, so as to readily accommodate the work and insure a proper support and gage for the same while undergoing punching.

In order to support the punches E and to properly adjust the same in a longitudinal direction relativelyto the dies 0, I provide the following device: The head D is formed on engaged by correspondingly-shaped punchits under side with a dovetailed groove D, stocks Q, each formed with a cylindrical projection Q, threaded to receive a coupling R, adapted to support the head E of the corresponding punch E,the said head abutting with its top face against a pin S, fitted to slide vertically in the punch-stock Q. The upper end of the pin S is formed with a conical head S, fitting loosely in a corresponding aperture in the punch-stock and adapted to abut with its upper face againstthe under side of a steelplate backing or lining T, fastened by screws to the head D at the bottom of the dovetailed groove D, as is plainly indicated in Fig. 3.

Now it is evident that when the coupling R is screwed outward the punch-stock Q can be readily shifted longitudinally in the groove D, so as to bring the punch Ein proper alinement with the opening in the die G. hen the desired place has been reached, then the coupling R is screwed up to cause the head E of the punch to push the pin S upward, so that the head S of the pin S abuts against the steel lining or backing T, and upon a further screwing of the coupling R the punchstock Q is caused to move downward, so as firmly clamp or bind in the groove D to securely hold the parts in place.

Now it will be seen that by the arrangement described both the dies and punches may be readily adjusted lengthwise on a punch-press or like machine on which the parts are used, so as to insure proper punching of the work at the desired places.

Vhen the machine is in operation and the ram, with its head D, carrying the punches E, descends, then the latter punch the desired apertures into the work on top of the dies 0, the strain on the punches being taken up by the pins abutting with their heads against the steel backing or lining in the head, so that the fastening devices for the punches, consisting of the punch stocks or holders and the coupling, are completely relieved from such strain and are not liable to become loose and displaced, as is so frequently the case as heretofore constructed. The punch stocks or holders may also be locked in place on the head D by a device similar to that for the dies C-namely, by a pressure-bar and setscrews, as above described.

It is evident that a great variety of work can be accomplished by the arrangement described without requiring special and separate attachments, as is necessary in punchpresses and the like heretofore constructed.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent 1. A machine of the class described, provided with a punch-stock fitted to slide in the head,a pressure-pin carried by the said punchstock, and a coupling for carrying the punch and screwing on the said punch-stock, to press the said pin in engagement with the head and to clamp the punch-stock in place on the head, substantially as shown and described.

2. A machine of the class described, having a head provided with a dovetailed slot, a punch stock having a central hole therethrough and fitted to slide in said slot, a cap screwin g upon said punch-stock, and a punch having an enlarged section fitting within said cap and a bearing connection with the head through the hole in the punch-stock, substantially as described.

3. A machine of the class described, provided with a base-block formed with a longitudinally-extending dovetailed groove, a bolt having a head adjustable in the said groove, and a stripper engaged by the said bolt, and formed at its rear end with a foot resting on the said base-block, substantially as shown and described.

4. A machine of the class described, provided with a base-block formed with a longitudinally-extending dovetailed groove, a bolt formed with a dovetailed head fitted to slide in the said groove, a stripper engaged by the said bolt, and a gage resting on the said block, and engaged on the top by the said stripper, to securely hold the gage in place 011 the baseblock, substantially as shown and described.

5. A machine of the class described, provided with a base-block formed with a longitudinal1y-extending dovetailed groove, a bolt formed with a dovetailed head fitted to slide in the said groove, a stripper engaged by the said bolt, a gage resting on the said block, and engaged on the top by the said stripper, to securely hold the gage in place on the baseblock, and pins held transversely adjustable in the said gage, and adapted to be locked in place by eyebolts on the gage, as set forth.

6. A machine of the class described, provided with a head having a longitudinallyextending dovetailed groove, a dovetailed punch-stock fitted to slide in the said. groove, and formed with a threaded projection,a coupling screwing on the said projection, and carrying the punch, and a pin fitted to slide in the said stock, and adapted to be engaged by the punch to move the pin against the head .upon screwing up the coupling and drawing the stock in firm contact with the head, to lock the stock in place, substantially as shown and described.

7. A machine of the class described, provided with a head having a longitudinally extending dovetailed groove, a dovetailed punch-stock fitted to slide in the said groove,

and formed with a threaded projection,a c0upling screwing on the said projection and carrying the punch, and a pin fitted to slide in he said stock, and adapted to be engaged by the punch, to move the pin against the head upon screwing up the coupling and drawing the stock in firm contact with the head, to lock the stock in place, the said pin'being formed with a head, for taking up the strain from the punch, substantially as shown and described.

8. A machine of the class described, having a punch-stock fitted to slide upon the head and having a hole therethrough in the line of motion and giving access to the head, a cap screwing upon the punch-stock, and a punch having an enlarged section within said cap and a bearing connection with the head through said hole, whereby the punch and punch-stock are firmly held upon the head, substantially as described.

' LEVI FISHER. VVitnesses:

GEORGE WEDLAKE, WILLIAM FRANK GUNSON. 

